Full beam only on the offside

[pierce]

Hi when I click the full beam on I only get the right hand light and the near side headlight goes off

Any ideas, I have changed the headlight relay

[davidoft1]

The bulb ?

[maxstu]

Or an earth wire watery grave. Give the lamp a gently palm thump.

[pierce]

I have cleaned all the main earth behind the fuse box, I ran a separate earth for the lights to the chassis too.
I don’t think it’s a bulb or anything because the near side headlamp and sidelight go out when the full beam is on.

[maxstu]

I have cleaned all the main earth behind the fuse box, I ran a separate earth for the lights to the chassis too.
I don’t think it’s a bulb or anything because the near side headlamp and sidelight go out when the full beam is on.

That's how my camper works. Headlamp bulb either blown or corroded terminals if blue main beam light stays illuminated.
Test the bulb.

[Robsey]

I would say it is the high-beam filament of the bulb.

[pierce]

That was very promising news thanks.
I have changed th bulb and went to test again, but now no high beam at all
I have had the indicator stalk off and the relay
There is 2x12v going to the indicator stalk but when I remove the stalk and try and find a contact that has continuity to the 12v pins, there is nothing, as though the switch isn’t working.
I have also tried removing the plug from the switch and individually shortening a live to each of the pins and the full beam doesn’t come on.
It seems funny that the switch would break.
I have checked the 10a fuses 9, 10 20, 21

[pierce]

I checked the bulbs too all ok

[clift_d]

You might have done this already, but in cleaning all of the connectors, earth crown, etc don't forget those at the headlamp unit. Speaking from experience.

[silverbullet]

Classic bad earth return fault.

[pierce]

Nice one, I will check the earths agin maybe change a few connectors, thanks for your input

[pierce]

I finally got to the bottom of this yesterday, I will update just incase anyone else has the issue.

The original issue was caused by a jumper connector across the high beam relay holder had broken, it wasn't visible as it was quite close to the screw, 

The second issue with nothing working, I had missed clipping a plastic clip to the lefthand side of the indicator stalk, so a bit of human error doh.

Thanks for your inputs